The shortest preview ever!!!

"Luna, go warn camp about 9 new half bloods and don't forget to mention that 3 of them have yet to acquire a cutie mark!" Celestia shouted over the howling wind as they descended towards ponyville

Luna quickly wave goodbye to her sister as she sped into the everfree forest and towards camp.

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"Okay, let me get this straight celestia was a changeling, had nothing to do with the hydra I defeated via pure coolness and isn't trying to kill us while we wait for the real celestia to arrive even though that was its goal?" Rainbow dash asked after every pony had recovered from the shock of the white stallion.

"Tails twitching" pinkie shouted

The group of friends looked at each other before grabbing the crusaders and rush for cover, leaving the changeling to stand and wonder what these strange ponies were talking about. However the changeling was not there for long as a light yellow beam hit it on the back of the neck and banishing it to the moon.

Scootaloo jumped up and started trotting out of the trees and towards the path they had stood on moments ago, only to be pulled back by her idol. Yet the orange Pegasus understood why rainbow had been so worried about staying under the trees when princess celestia landed where she was hoping to stand.